Class: Rivulet::SumWindow

Inherits:
Window
  • Object
show all
Defined in:
lib/rivulet/sum_window.rb

Instance Method Summary collapse

Methods inherited from Window

#empty?, #size

Constructor Details

#initialize ⇒ SumWindow

Returns a new instance of SumWindow.



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# File 'lib/rivulet/sum_window.rb', line 5

def initialize
  super
  @sum = 0
  @items = []
  @front = 0
end

Instance Method Details

#add(value) ⇒ Object 



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# File 'lib/rivulet/sum_window.rb', line 12

def add(value)
  @sum += value
  @items.push(value)
  super
end

#average ⇒ Object 



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# File 'lib/rivulet/sum_window.rb', line 28

def average
  @sum.fdiv(size) unless empty?
end

#evict ⇒ Object 



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# File 'lib/rivulet/sum_window.rb', line 18

def evict
  if @front < @items.size
    @sum -= @items[@front]
    @front += 1
  end
  super
end

#sum ⇒ Object 



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# File 'lib/rivulet/sum_window.rb', line 26

def sum = @sum